I think the bullet+block will rotate about its centre of mass? If that's the case then the moment of inertia can be found using I=1/2*m*(a^2+b^2). But the question hints that we should include the bullet's effect on the moment of inertia (the bullet's moment of inertia would be I=m*r^2, yeah?).
Homework Statement
Hello, first year engineering student here :)https://fbcdn-sphotos-h-a.akamaihd.net/hphotos-ak-xpf1/v/t35.0-12/10744040_871781156179440_107104578_o.jpg?oh=73c4261941e7ef6b7c682558c0925a63&oe=544F5CA4&__gda__=1414428985_0415c28b8b2e194bf0b57f065267fe49 [/B]
The question is...